package com.bins.charts.protobuf;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.protobuf.ProtobufEncoder;

public class Client {
    public static void main(String[] args) {
        // 客户端需要一个事件循环组
        EventLoopGroup eventExecutors = new NioEventLoopGroup();

        try {
            // 创建客户端启动对象
            Bootstrap bootstrap = new Bootstrap();
            // 设置相关参数
            bootstrap.group(eventExecutors) // 设置线程组
                    .channel(NioSocketChannel.class) // 设置客户端通道的实现类（反射）
                    .handler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) {
                            ChannelPipeline pipeline = ch.pipeline();
                            // 在pipeline中加入ProtoBufEncoder
                            pipeline.addLast("encoder", new ProtobufEncoder());
                            pipeline.addLast(new ClientHandler()); // 加入自己的处理器
                        }
                    });

            System.out.println("客户端准备完毕...");

            // 启动客户端去连接服务器端
            ChannelFuture cf = bootstrap.connect("127.0.0.1", 6666).sync();
            // 对关闭通道进行监听
            cf.channel().closeFuture().sync();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            eventExecutors.shutdownGracefully();
        }
    }
}